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प्रश्न
Explain the different steps involved during primary treatment phase of sewage.
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उत्तर
The primary treatment phase of sewage involves the removal of coarse solid materials through filtration and sedimentation. The diluted sewage is passed through a series of filters of sequentially small pore sizes to remove large floating objects. Then the filtered sewage is passed into the grit chamber where the coarse solid materials settle by gravity. After this, the sewage is allowed to pass into a sedimentation tank where the suspended materials settle and form the primary sludge. The effluent is then taken for the secondary treatment.
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संबंधित प्रश्न
Answer the following question.
What are 'flocs', formed during secondary treatment of sewage?
Small part of activated sludge is passed back into ______ and major part is pumped into large tanks called ______.
Which of the following occurs during secondary treatment?
Study the following statements regarding tertiary treatment of sewage and choose the correct option.
i. It produces methane gas.
ii. The effluents formed from these plants undergo chlorination.
iii. BOD is significantly increased at this step.
iv. It includes screening and passage of effluent through grit chamber.
The primary treatment of waste water involves the removal of ______.
Activated sludge should have the ability to settle quickly so that it can ______.
Study the given diagram of the Sewage Treatment Plant (S.T.P.) and answer the question that follows:
- Which one of the two 'S.T.P.' (A) or (B) will be more effective in treating the human excreta in municipal waste?
- Write the steps followed in carrying the treatment of the sewage in step (Z), once the BOD of sewage is reduced significantly till it is passed on to the "anaerobic sludge digesters".
Given below is the flowchart of sewage treatment. Identify A, B, C, D and E and select the correct option.
Which one is wrongly matched?
Approximately what percentage of suspended solids is removed during primary sedimentation in a sewage treatment plant?
